TTY: synclinkmp, add tty install

This has two outcomes:
* we give the TTY layer a tty_port
* we do not find the info structure every time open is called on that
  tty

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 19 insertions, 9 deletions

diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index 95fd4e20b96..53429c890a8 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -711,15 +711,11 @@ static void ldisc_receive_buf(struct tty_struct *tty,
 
 /* tty callbacks */
 
-/* Called when a port is opened.  Init and enable port.
- */
-static int open(struct tty_struct *tty, struct file *filp)
+static int install(struct tty_driver *driver, struct tty_struct *tty)
 {
         SLMP_INFO *info;
-        int retval, line;
-        unsigned long flags;
+        int line = tty->index;
 
-        line = tty->index;
         if (line >= synclinkmp_device_count) {
                 printk("%s(%d): open with invalid line #%d.\n",
                         __FILE__,__LINE__,line);
@@ -727,17 +723,30 @@ static int open(struct tty_struct *tty, struct file *filp)
         }
 
         info = synclinkmp_device_list;
-        while(info && info->line != line)
+        while (info && info->line != line)
                 info = info->next_device;
         if (sanity_check(info, tty->name, "open"))
                 return -ENODEV;
-        if ( info->init_error ) {
+        if (info->init_error) {
                 printk("%s(%d):%s device is not allocated, init error=%d\n",
-                        __FILE__,__LINE__,info->device_name,info->init_error);
+                        __FILE__, __LINE__, info->device_name,
+                        info->init_error);
                 return -ENODEV;
         }
 
         tty->driver_data = info;
+
+        return tty_port_install(&info->port, driver, tty);
+}
+
+/* Called when a port is opened.  Init and enable port.
+ */
+static int open(struct tty_struct *tty, struct file *filp)
+{
+        SLMP_INFO *info = tty->driver_data;
+        unsigned long flags;
+        int retval;
+
         info->port.tty = tty;
 
         if (debug_level >= DEBUG_LEVEL_INFO)
@@ -3881,6 +3890,7 @@ static void device_init(int adapter_num, struct pci_dev *pdev)
 }
 
 static const struct tty_operations ops = {
+        .install = install,
         .open = open,
         .close = close,
         .write = write,